Creating a Polymorphic Exception Class
To create a polymorphic exception class, derive a custom exception class from ‘std::exception’. Override the ‘what()’ function to provide a custom error message.
C++
#include <iostream> #include <exception> // Define a custom exception class 'MyException' // It inherits from 'exception' class MyException : public exception { public: // Constructor for 'MyException' // message is taken as parameter MyException(const char* message) : message_(message) {} // Here, we override the 'what' function present in 'exception' // This is done to provide a custom error message const char* what() const noexcept override { return message_.c_str(); } private: // member variable to store error message string message_; }; |
Polymorphic Exceptions In C++
C++ is a powerful programming language that allows developers to handle errors and exceptional situations using exceptions. In this article, we will explore the concept of polymorphic exceptions in C++. Polymorphic exceptions allow you to create custom exception classes that can be caught at different levels of specificity, providing more detailed error information when needed. We’ll learn how to create and use polymorphic exception classes and understand their benefits in improving code clarity and maintainability.
Polymorphism in C++ allows different classes to be treated as objects of a common base class. This concept can be extended to exception handling.
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